Earls makes a lot of different hoses. That looks like their pro-lite 350 hose? Irrelevant, but even that hose is rated for vacuum at high oil temps. Unlikely that your hose is collapsing, in my opinion.
Oil that has been aerated will cause false oil pressure readings. The air bubbles in oil will often cause the oil pressure to read fine, because air is compressible, but in reality it’s not fine, and oil volume, not pressure, will be compromised, causing problems. However since your oil pressure gauge is bottoming out with heat, you have other issues.
What kind of pressure do you have at cold startup/idle?
Was this drysump setup designed by yourself, or a dealer?
Have you inspected your oil filter element for debris during this issue?
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